Door locking mechanism



Aug. 19, 1969 SCHACHT 3,462,182

DOOR LOCKING MECHANISM Filed April 18, 1966 INVENTOR. LOUIS L. SCHACHT BY-MGQ ATTORNEY United States Patent 3,462,182 DOOR LOCKING MECHANISM Louis L. Schacht, New York, N.Y., assignor to Schacht Associates, Inc., Bronx, N.Y., a corporation of New York Filed Apr. 18, 1966, Ser. No. 543,271 Int. Cl. Ec 9/16, 7/00, N06

US. Cl. 292-36 5 Claims ABSTRACT OF THE DISCLOSURE A pair of oppositely hung swinging doors have a top and bottom flush bolt mechanism including linkages, a crank plate and an actuating device for the crank plate disposed in the meeting stile of one door. The actuating device normally closes an aperture in the surface of the stile. A horizontal dead bolt is disposed in a horizontal bore on a rail of the other door and is extendable into the aperture in the stile of the said one door.

This invention relates to closure fastening means, and more particularly, to an improved locking arrangement for a pair of oppositely hung swinging doors.

Oppositely hung swinging doors are commonly operated in one of three modes: (1) both doors locked; (2) both doors unlocked: and (3) one door locked and one door unlocked. In the third mode, the unlocked door is called the operating door and the locked door is called the opposite door. Various arrangements of locks have been utilized to provide independent locking of the doors such as, cylinder operated flush bolts and dead bolts, generally requiring a plurality of visible cylinders.

It is an object of this invention to provide a locking arrangement for a pair of oppositely hung swinging doors wherein only one cylinder is visible, whether the doors are closed or opened.

A feature of this invention is the provision of a pair of oppositely hung swinging doors, a top and bottom flush bolt medhanism being disposed in a vertical bore with an actuating device normally disposed in a horizontal bore in a meeting stile of the opposite door, and a horizontal dead bolt disposed in a horizontal bore in a rail of the operating door and extendable into said horizontal bore in which said actuating device is normally disposed.

These and other objects and features of this invention will be apparent from the following specification, taken in conjunction with the accompanying drawing in which:

FIG. 1 is a perspective view of a pair of doors embodying this invention;

FIG. 2 is a partial front view in cross-section taken along the plane 22 of FIG. 1;

FIG. 3 is a partial top view in cross-section taken along the plane 3--3 of FIG. 2;

FIG. 4 is a partial right edge view of the opposite door meeting stile taken along the plane 4-4 of FIG. 3;

FIG. 5 is a partial right edge view in cross-section of the opposite door meeting stile taken along the plane 55, showing the flush bolt linkage in its locked position; and

FIG. 6 is a view similar to FIG. 5 showing the flush bolt linkage in its unlocked position.

As seen in FIG. 1, a pair of oppositely hung swinging doors comprises an operating door 10, an opposite door 12, a left jamb 14, a right jamb 16, a common header 18, and a common sill 20. The operating door 10 includes a right stile 22, a left or meeting stile 24, a top rail 26, a middle rail 28, and a bottom rail 30. The opposite door 12 includes a left stile 32, a right or meeting stile 34, a top rail 36, a middle rail 38, and a bottom rail 40. The

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operating door also includes a lock cylinder 42 which may be mounted in a push bar 44.

The flush bolt mechanism 46 is disposed within a bore provided by the bent sheet metal construction of the meeting stile 34 of the opposite door. This mechanism includes a top bolt 48 which is coupled to the upper end of a top link 50, and a bottom bolt 52 which is coupled to the lower end of a bottom link 54. The top bolt has a short length of axial freedom provided by its shaft 56 which slides within the tubular upper end 58 of the upper link, is biased by a compression spring 60 and is limited by a pin 62. When extended, the bolt 48 enters a socket 64 in the header 18. The bottom bolt has a limited amount of radial freedom provided by a pivotal coupling 66. When extended, the bottom bolt 52 enters a socket 67 in the sill 20.

The lower end of the link 50 is coupled by a pivot 68 to a crank plate 70; the upper end of the link 54 by a pivot 72 to the crank plate 70. The crank plate 70 has an elongated, central aperture 74. A tube 76 has an annular flange 78 at its right end and a threaded portion 80 at its left end. A back up plate 82 has a central aperture 84 which passes the tube 76, and a recess 86 which receives the flange 78. The back up plate is adhered, as by welding, to the crank plate, thereby rotatably mounting the tube to the crank plate. A guide plate 88 has a central aperture 90 which passes the tube 76, has a width which is substantially equal to the bore of the stile, and a bent over lug 92. The crank plate, the back up plate and the guide plate are mounted on the tube 76. The tube passes through an aperture 94 in the stile 34 communicating with the middle rail 38, and is secured thereto by a nut 96. The width of the back up plate precludes its rotation within the stile, and the bent over lug 92 limits the rotation of the crank plate 70.

A tube 98 has its right end 100 flattened somewhat to mate with and to pass through the elongated aperture 74. A disk 102 with a similar elongated aperture 104 is fixed to and flush with the extremity of the right end 100. The left end 106 of the tube 98 passes through the tube 76 and through a circular aperture 108 in a bracket 110 which is fixed within the middle rail 38. A compression spring 112 is disposed on the tube 98 between the bracket 110 and the enlarged diameter provided by the flattened right end 100. A pin 114 fixed to the tube 98 on the left side of the bracket 100 limits the projection of the tube 98 towards the right under the bias of the spring 112 so that the right face of the disk 102 passes into an aperture 116 in the right wall of the stile 34 and is flush with the exterior surface of the stile 34.

It will be appreciated that clockwise rotation of the right end 100 of the tube 98, as by a screwdriver inserted into its flattened bore, will crank out the bolts 48 and 52 into their respective sockets 64 and 67; while counter-clockwise rotation will withdraw the bolts into the stile 34. The disk 102 serves to close the aperture 116, while permitting the rotation of the tube 98.

The lock cylinder 42 is coupled to a crank mechanism 118 to which a dead bolt 120 is coupled by a link 122. The dead bolt 120 is journalled through a right aperture 124 in the stile 24.

The left end 126 of the bolt passes into a left aperture 128 in the stile 24. When the bolt is in its right, retracted position, wherein the operating door is unlocked, the extremity of the left end is flush with the outer surface of the stile 24. When the lock cylinder 42 is rotated, extending the dead bolt to the left, this bolt passes through the aperture 128, pushes the disk 102 and the tube 98 to the left, and passes through the aperture 116 into the stile 34 of the opposite door.

It will be apparent that the tube and disk assembly 98, 102 serves a twofold function, that of actuating the flush bolt linkages, and that of closing and opening the socket or striker to receive the dead bolt.

While I have shown and described the preferred embodiment of my invention, it will be understood that the invention may be embodied otherwise than as herein specifically illustrated or described, and that certain changes in the form and arrangement of parts and in the specific manner of practicing the invention may be made without departing from the underlying idea or principles of this invention within the scope of the ap pended claims.

What is claimed is:

1. A lockable closure apparatus comprising:

a pair of oppositely hung swinging doors, each of said doors having a meeting stile;

a verticle flush bolt mechanism disposed in a vertical bore in said meeting stile of one of said doors, with an actuating device for said flush bolt mechanism coupled thereto and normally disposed in a horizontal bore in said meeting stile of said one of said doors;

a horizontal bolt disposed in a horizontal bore in the meeting stile of the other of said doors, substantially coaxial to and adapted to enter said horizontal bore of said actuating device, driving said actuating device before it;

said actuating device, when in its normal position, serving to close the opening of its bore in the outer surface of its stile;

said tfi-ush bolt mechanism including a flush bolt coupled to a crank plate by a link, said crank plate being mounted for rotation to said stile by a tubular pivot means and having a central aperture which is coaxial with said tubular pivot means; said actuating device being slidable within said central aperture and said tubular pivot means and keyed to said central aperture to rotatably drive said crank plate.

2. A lockable closure apparatus comprising:

a pair of oppositely hung swinging doors, each of said doors having a meeting stile;

a vertical flush bolt mechanism disposed in a vertical bore in said meeting stile of one of said doors;

said flush bolt mechanism including a flush bolt coupled to a crank plate by a link;

said crank plate being mounted for rotation to said 4 stile by a tubular pivot means and having a central aperture which is coaxial with said tubular pivot means; and an actuating device disposed and slidable within said central aperture and said tubular pivot means and keyed to said central aperture, and adapted to be rotated and therewith rotate said crank plate. 3. Apparatus according to claim 2 wherein said actuating device is coaxial with an aperture in the outer surface of the stile; and further including a spring means normally biasing said actuating device for sliding movement within said central aperture to close said aperture in the surface of the stile, and stop means precluding passage of said actuating device beyond an aperture. 4. Apparatus according to claim 3 wherein said crank plate has two normal positions, one with the bolts extended and the other 'with the bolts retracted, and said actuating device is slidable in any position of said crank plate. 5. Apparatus according to claim 4 further including a horizontal bolt disposed in a horizontal bore in the meeting stile of the other of said doors, substantially coaxial to and adapted to enter said aperture in said outer surface of said meeting stile of said one door, sliding said actuating device against the bias of said spring means.

References Cited UNITED STATES PATENTS 23,264 3/ 1859 Roberts 292-40 932,330 8/1909 Rotchford 292-33 1,094,278 4/1914 Van Den Plas 292-40 1,142,463 6/ 1915 Shepherd 29240 1,269,430 6/ 19 18 Grzech 292-39 FOREIGN PATENTS 54,984 12/ 1910 Switzerland.

DAVID J. WILLIAMOWSKY, Primary Examiner J. K. BELL, Assistant Examiner US. or. X.R. 

